将IO流中字节流-->字符流

  如何将字节流转成字符流？

private static void byteToCharacter() {
		try {
			// 字节流
			FileInputStream fis = new FileInputStream("book.xml");
			
			//将字节流转成（字符流）
			InputStreamReader isr = new InputStreamReader(fis);
			
			// 缓冲流
			BufferedReader br = new BufferedReader(isr);
			//存放数据
			String str = null;
			//遍历数据
			if ((str = br.readLine()) != null) {
				System.out.println(str);
			}
			
			//关闭流
			br.close();
			isr.close();
			fis.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

book.xml文件：

<?xml version="1.0" encoding="UTF-8"?>  
<books>  
    <book id="12">  
        <name>thinking in java</name>  
        <price>85.5</price>  
    </book>  
    <book id="15">  
        <name>Spring in Action</name>  
        <price>39.0</price>  
    </book>  
</books>